6.6 Further Information
This shader and others are available from the 3Dlabs developer Web site. Source code for getting started with OpenGL shaders is also available.
 Former 3Dlabs developer Web site. Now at http://3dshaders.com.
 Baldwin, Dave, OpenGL 2.0 Shading Language White Paper, Version 1.0, 3Dlabs, October, 2001.
 Ebert, David S., John Hart, Bill Mark, F. Kenton Musgrave, Darwyn Peachey, Ken Perlin, and Steven Worley, Texturing and Modeling: A Procedural Approach, Third Edition, Morgan Kaufmann Publishers, San Francisco, 2002. www.texturingandmodeling.com
 Kessenich, John, Dave Baldwin, and Randi Rost, The OpenGL Shading Language, Version 1.40, 3Dlabs/Intel, March 2008. www.opengl.org/documentation/specs/
 Segal, Mark, and Kurt Akeley, The OpenGL Graphics System: A Specification (Version 3.1), Editor (v1.1): Chris Frazier, (v1.2–3.1): Jon Leech, (v2.0): Jon Leech and Pat Brown, March 2008. www.opengl.org/documentation/specs/